18 years after the game's release, on September 16th 2017, a Silent Hill fan community member by the name of roocker666 posted images of never before seen enemies hidden in the game's files online. These formerly unseen creatures include a giant headless frog (FRG), a possibly monkey based creature (MKY), an ostrich like creature (OST), a purple moth (BTFY), stingrays (El), and a faceless snake (SNK).

In the North American version, the enemies known as "Grey Children" bare a strong resemblance to real-life children, however in the Japanese & European versions they were instead replaced by "Mumblers".

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In the Silent Hill demo included in the Official U.S. PlayStation Magazine Demo Disc #16, there are a number unused early artwork and placeholder images found in the game's files. One of the placeholder images for the Options screen is of a group of Japanese women posing naked, and another for the Save/Load screen is of a naked woman laying on a hospital bed.